One easy way to make your navigation menu more user-friendly is to disable the current page in the menu. We provide interface templates as an alternative to the markedly high prices that many professional design companies charge for even the smallest projects.
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A database is a collection of data that is organized and stored according to some purpose. A relational database represents data in tables such as this and provides retrieval operations that generate new tables from existing ones. As a result, the programmer sees the database in the form of such tables.
MySQL is an inexpensive, lightweight and fast RDBMS. It supports C, Perl, Java (via the Java Database Connectivity API [JDBC]) and Python programming. With the tools MySQL provides these languages, it is possible to create full-blown client/server applications and database-integrated Web sites without spending a fortune.
Suppose you wish to create a database to track the interesting information pertaining to a large collection of compact discs. It is useful to simply list data items that should be stored. One possible list might include CD title, record label, artist and song title as shown in the table below. Sarah McLachlan is repeated twice for each of her CDs.
Create a new entity (also referred to as a junction entity). Name it appropriately. If you cannot think of an appropriate name for the junction entity, name it by combining the names of the two related entities. Relate the new entity to the two original entities. Each of the original entities should have a one-to-many relationship with the junction entity.
New users arriving at an eCommerce site for the first time may create accounts. After successful authentication, users may add items they are interested in purchasing to their shopping carts and view the list of items in their carts. When viewing shopping cart contents, users may wish to change the quantities of items they have selected.
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